Phylogeny and ontogeny of the phosphoglycerate mutases-v. inactivation of phosphoglycerate mutase isozymes by histidine-specific reagents

1. The three isozymes of glycerate-2,3-P"2 dependent phosphoglycerate mutase present in tissues of mammals and reptiles were inactivated by both treatment with diethylpyrocarbonate and photooxidation with rose bengal.2. Inactivation of type M isozyme purified from rabbit muscle was complete when two... Ausführliche Beschreibung

1. Person: Carreras, J.
Weitere Personen: Mezquita, J.; Pons, G.
Quelle: in Comparative Biochemistry and Physiology -- Part B: Biochemistry and Vol. 72, No. 3 (1982), p. 401-407
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Format: Online-Artikel
Sprache: English
Veröffentlicht: 1982
Beschreibung: Online-Ressource
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Anmerkung: Copyright: Copyright (c) 2002 Elsevier Science Inc.
Zusammenfassung: 1. The three isozymes of glycerate-2,3-P"2 dependent phosphoglycerate mutase present in tissues of mammals and reptiles were inactivated by both treatment with diethylpyrocarbonate and photooxidation with rose bengal.2. Inactivation of type M isozyme purified from rabbit muscle was complete when two histidine residues per enzyme subunit were carboethoxylated. Hydroxylamine removed the carboethoxy groups, with partial recovery of the enzymatic activity. The cofactor protected the enzyme against inactivation.3. The inactivation of rabbit muscle phosphoglycerate mutase by photooxidation with methylene blue and rose bengal was sharply pH dependent. The pH profile of enzyme inactivation followed the titration curve of histidine, suggesting that this amino acid was critical for enzyme activity. Glycerate-2,3-P"2 did not protect phosphoglycerate mutase against photoinactivation.
ISSN: 0305-0491

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